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A porphyritic igneous rock is one with a texture containing large isolated crystals (phenocrysts) in a mass of fine grained crystals . Porphyritic texture indicates that a magma has gone through a two stage cooling process. The magma has cooled sufficiently underground to allow some minerals to crystallize and grow in size; the magma is then expelled above ground where the remaining liquid magma solidifies quickly, allowing only small crystals to develop.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoA porphyry is a type of igneous rock derived from a two stage cooling process.
Wiki User
∙ 11y agoyes it is an igneous rock
Wiki User
∙ 13y agoPorphyry is an igneous rock
Wiki User
∙ 13y agoi think it is extrusive.
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What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture which is?
porphyritic
Is diorite intrusive or extrusive?
Diorite is an intrusive igneous rock. Its extrusive equivalent is andesite.
Is talc intrusive or extrusive rock?
its considerd intrusive
Is peridot an intrusive or extrusive igneous rock?
Peridot is olivine, which is a mineral, not a rock. It is found in both intrusive and extrusive rocks.
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture which is?
porphyritic
Is dacite intrusive or extrusive?
Dacite is extrusive. Its intrusive equivalent is granodiorite.
Is basalt an intrusive rock or extrusive rock?
Extrusive. Solidifies above ground level.
Is diorite intrusive or extrusive?
Diorite is an intrusive igneous rock. Its extrusive equivalent is andesite.
Is schist an intrusive or extrusive rock?
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.
Is a metamorphic rock intrusive or extrusive?
It is neither. Intrusive and extrusive are terms used to describe igneous rock.
Is talc intrusive or extrusive rock?
its considerd intrusive
Is obsidian a intrusive or extrusive igneous rock?
Andesite is considered an extrusive igneous rock.
Is Obsidian an extrusive rock or intrusive rock?
Yes it is extrusive love yall
Are basalt extrusive or intrusive?
Basaltic rock are true to be extrusive rock
Is dunite an intrusive or extrusive igneous rock?
intrusive
